Natural Rhodolite Garnet 21.33 ct Octagonal Emerald Cut, Certified Large Red Loose Gemstone for Statement Ring Pendant

Natural Rhodolite Garnet – 21.33 Carat Octagonal Emerald Cut Loose Gemstone

A substantial 21.33 carat natural rhodolite garnet with a rich red appearance and striking geometric octagonal emerald cut.

The accompanying AGCL gemstone report identifies this exact stone as Natural Rhodolite – Garnet Family. Measuring approximately 17.56 x 13.20 x 9.00 mm, this large transparent faceted gemstone offers dramatic visual presence for a statement ring, cocktail ring, bespoke pendant, custom fine jewelry design, or gemstone collection.

The broad emerald-style facet arrangement and clipped corners create a bold architectural appearance. Depending on the lighting and viewing angle, the garnet can display deep red areas with brighter crimson-red reflections through its facets.

Gemstone details

Gemstone Identification: Natural Rhodolite – Garnet Family
Color: Red
Transparency: Transparent
Weight: 21.33 carats
Shape & Cut: Octagonal / Emerald Cut
Dimensions: Approximately 17.56 x 13.20 x 9.00 mm
Refractive Index: 1.760
Hardness: 7
Absorption Spectrum: Iron Spectrum
Laboratory: Arctic Gem Certification & Laboratory – AGCL
Report Number: F260631
Report Date: 06 June 2026

The current laboratory report does not state geographic origin or treatment status. We therefore do not make a specific origin or untreated claim for this gemstone.

What could you create with this 21.33 carat rhodolite garnet?

This exceptionally large natural garnet could become the centerpiece of a truly individual jewelry design.

Possible ideas include:

• Large rhodolite garnet statement ring
• Bold cocktail ring
• Octagonal emerald cut gemstone ring
• Natural diamond accent ring
• Custom yellow gold or platinum setting
• Large bespoke garnet pendant
• Contemporary architectural jewelry design
• High jewelry-inspired gemstone piece
• Natural gemstone collector display piece

The rich red color could pair beautifully with yellow gold or rose gold for a warm appearance. White gold or platinum may create stronger contrast, while natural diamond accents could add additional brilliance around the red center gemstone.

Because this garnet measures approximately 17.56 x 13.20 x 9.00 mm, we recommend that your jeweler review the exact measurements and gemstone depth before creating the setting. Due to its substantial size, a custom-made setting may be the best option.

More photos and videos

View additional close-up photos and videos of this exact natural rhodolite garnet here:

https://www.sapphirepal.com/products/natural-rhodolite-garnet-21-33-carat-octagonal-emerald-cut

About Sapphire Pal

Sapphire Pal is an Australian-based gemstone merchant established in 2014, supported by more than 60 years of family heritage in the natural gemstone trade.

Our natural gemstones are sourced through trusted direct dealers, long-standing gemstone networks, direct sourcing relationships, and established connections within the gem trade.

This gemstone is dispatched from Australia with free, fast, secure, and insured worldwide shipping.

Important natural gemstone note

Color may vary slightly across screens, camera settings, lighting conditions, and viewing angles. Red rhodolite garnet may appear deeper, darker, brighter, or more crimson depending on the light source and gemstone orientation.

Dimensions and weight are measured carefully; however, minor variations are normal for natural gemstones. Natural gemstones may display inclusions, growth characteristics, surface features, or other internal characteristics under magnification.

Please review all available gemstone photos, videos, measurements, laboratory report details, and product information before purchase.